1. Defragment your computer hard disk using free tools like SmartDefrag.
2. You should also defragment your Windows pagefile and registry.
3. Clean up hard drive disk space being taken up by temporary files, the recycle bin, hibernation and more. You can also use a tool like TreeSize to determine what is taking up space on your hard drive.
4. Load up Windows faster by using Startup Delayer, a free program that will speed up the boot time of Windows by delaying the startup of programs.
5. Speaking of startup programs, many of them are useless and can be turned off. Use the MSCONFIG utility to disable startup programs.
6. By default, the size of the paging file is controlled by Windows, which can cause defragmentation. Also, the paging file should be on a different hard drive or partition than the boot partition. Read here on the rules for best paging file performance.
7. In Windows XP and Vista, the Windows Search indexing service is turned on for all local hard drives. Turning off indexing is a simple way to increase performance.
8. If you don’t care about all the fancy visual effects in Windows, you can turn them off by going to Performance Options.
9. You can optimize the Windows boot time using a free program called Bootvis from Microsoft.
10. Clean your registry by removing broken shortcuts, missing shared DLLs, invalid paths, invalid installer references and more. Read about the 10 best and free registry cleaners.
11. One of the main reasons why PC’s are slow is because of spyware. There are many programs to remove spyware including Ad-Aware, Giant Antispyware, SUPERAntiSpyware, and more.
12. If you have a deeper spyware infection that is very hard to remove, you can useHijackThis to remove spyware.
13. Remove unwanted pre-installed software (aka junk software) from your new PC using PC Decrapifier.
14. Disable unnecessary Windows services, settings, and programs that slow down your computer.
15. Tweak Windows XP and tweak Windows Vista settings using free programs
16. Disable UAC (User Account Control) in Windows Vista
17. Tweak your mouse settings so that you can copy and paste faster, scroll faster, navigate quickly while browsing and more. Read here to learn how to tweak your mouse.
18. Delete temporary and unused files on your computer using a free program like CCleaner. It can also fix issues with your registry.
19. Delete your Internet browsing history, temporary Internet files, cookies to free up disk space.
20. Clean out the Windows prefetch folder to improve performance.
21. Disable the XP boot logo to speed up Windows boot time.
22. Reduce the number of fonts that your computer has to load up on startup.
23. Force Windows to unload DLLs from memory to free up RAM.
24. Run DOS programs in separate memory spaces for better performance.
25. Turn off system restore only if you regularly backup your Windows machine using third party software.
26. Move or change the location of your My Documents folder so that it is on a separate partition or hard drive.
27. Turn off default disk performance monitors on Windows XP to increase performance.
28. Speed up boot time by disabling unused ports on your Windows machine.
29. Use Process Lasso to speed up your computer by allowing it to make sure that no one process can completely overtake the CPU.
30. Make icons appear faster while browsing in My Computer by disabling search for network files and printers.
31. Speed up browsing of pictures and videos in Windows Vista by disabling the Vista thumbnails cache.
32. Edit the right-click context menu in Windows XP and Vista and remove unnecessary items to increase display speed.
33. Use the Windows Performance Toolkit and the trace logs to speed up Windows boot time.
34. Speed up your Internet browsing by using an external DNS server such as OpenDNS.
35. Improve Vista performance by using ReadyBoost, a new feature whereby Vista can use the free space on your USB drive as a caching mechanism.
36. If you have a slow Internet connection, you can browse web pages faster using a service called Finch, which converts it into simple text.
37. Use Vista Services Optimizer to disable unnecessary services in Vista safely.
38. Also, check out my list of web accelerators, which are programs that try to prefetch and cache the sites you are going to visit.
39. Speed up Mozilla Firefox by tweaking the configuration settings and by installing an add-on called FasterFox.
40. Learn how to build your own computer with the fastest parts and best hardware.
41. Use a program called TeraCopy to speed up file copying in Windows XP and Vista.
42. Disable automatic Last Access Timestamp to speed up Windows XP.
43. Speed up the Start Menu in Vista by hacking the MenuShowDelay key in the registry.
44. Increase the FileSystem memory cache in Vista to utilize a system with a large amount of RAM.
45. Install more RAM if you are running XP with less than 512 MB or Vista with less than 1 GB of RAM.
46. Shut down XP faster by reducing the wait time to kill hung applications.
47. Make sure that you have selected “Adjust for best performance” on the Performance tab in System Properties.
48. If you are reinstalling Windows, make sure that you partition your hard drives correctly to maximize performance.
49. Use Altiris software virtualization to install all of your programs into a virtual layer that does not affect the registry or system files.
50. Create and install virtual machines for free and install junk program, games, etc into the virtual machines instead of the host operating system. Check out Sun openxVM.
51. Do not clear your paging file during shutdown unless it is needed for security purposes. Clearing the paging file slows down shutdown.
52. If your XP or Vista computer is not using NFTS, make sure you convert your FAT disk to the NTFS file system.
53. Update all of your drivers in Windows, including chipset and motherboard drivers to their latest versions.
54. Every once in a while run the built-in Windows Disk Cleanup utility.
55. Enable DMA mode in Windows XP for IDE ATA/ATAPI Controllers in Device Manager.
56. Remove unnecessary or old programs from the Add/Remove dialog of the Control Panel.
57. Use a program click memtest86 or Prime95 to check for bad memory on your PC.
58. Determine your BIOS version and check the manufactures website to see if you need to update your BIOS.
59. Every once in a while, clean your mouse, keyboard and computer fans of dust and other buildup.
60. Replace a slow hard drive with a faster 7200 RPM drive, SATA drive, or SAS drive.
61. Changing from Master/Slave to Cable Select on your hard drive configuration can significantly decrease your boot time.
62. Perform a virus scan on your computer regularly. If you don’t want to install virus protection, use some of the free online virus scanners.
63. Remove extra toolbars from your Windows taskbar and from your Internet browser.
64. Disable the Windows Vista Sidebar if you’re not really using it for anything important. All those gadgets take up memory and processing power.
65. If you have a SATA drive and you’re running Windows Vista, you can speed up your PC by enabling the advanced write caching features.
66. Learn how to use keyboard shortcuts for Windows, Microsoft Word, Outlook, orcreate your own keyboard shortcuts.
67. Turn off the Aero visual effects in Windows Vista to increase computer performance.
68. If you are technically savvy and don’t mind taking a few risks, you can try tooverclock your processor.
69. Speed up the Send To menu in Explorer by typing “sendto” in the Run dialog box and deleting unnecessary items.
70. Make sure to download all the latest Windows Updates, Service Packs, and hot fixes as they “normally” help your computer work better.
71. Make sure that there are no bad sectors or other errors on your hard drive by using the ScanDisk orchkdsk utility.
72. If you are not using some of the hardware on your computer, i.e. floppy drive, CD-ROM drive, USB ports, IR ports, Firewire, etc, then go into your BIOS and disable them so that they do not use any power and do not have to be loaded during boot up.
73. If you have never used the Recent Documents feature in Windows, then disable it completely as a long list can affect PC performance.
74. One basic tweak that can help in performance is to disable error reporting in Windows XP
75. If you don’t care about a pretty interface, you should use the Windows Classic theme under Display Properties.
76. Disable short filenames if you are using NTFS by running the following command: fsutil behavior set disable8dot3 1. It will speed up the file creation process.
77. If you have lots of files in a single folder, it can slow down Explorer. It’s best to create multiple folders and spread out the files between the folders.
78. If you have files that are generally large, you might want to consider increasing the cluster size on NTFS to 16K or even 32K instead of 4K. This will help speed up opening of files.
79. If you have more than one disk in your PC, you can increase performance by moving your paging file to the second drive and formatting the volume using FAT32 instead of NTFS.
80. Turn off unnecessary features in Vista by going to Control Panel, choosing Uninstall a program, and then clicking on Turn Windows features on and off. You can turn off Remote Differential Compression, Tablet PC components, DFS replication service, Windows Fax & Scan, Windows Meeting Space, and lots more.
81. Install a free or commercial anti-virus program to help protect against viruses, etc. Make sure to use an anti-virus program that does not hog up all of your computer resources.
82. Completely uninstall programs and applications using a program like Revo Uninstaller. It will get rid of remnants left behind by normal uninstalls.
83. If you know what you are doing, you can install several hard drives into your machine and set them up in RAID 0, RAID 5, or other RAID configurations.
84. If you are using USB 1.0 ports, upgrade to 2.0. If you have a Firewire port, try to use that instead of a USB port since Firewire is faster than USB right now.
85. Remove the drivers for all old devices that may be hidden in Device Manager that you no longer use.
86. A more extreme option is to choose a faster operating system. If you find Vista to be slow, go with Windows XP. Switching to Mac or Linux is also an option.
87. One of the easiest ways to speed up your PC is to simply reformat it. Of course, you want to backup your data, but it is the best way to get your computer back to peak performance.
88. Speed up Internet browsing in IE by increasing the number of max connections per server in the registry.
89. If you use uTorrent to download torrents, you can increase the download speeds by tweaking the settings.
90. If you have a desktop background, make sure it’s a small and simple bitmap image rather than a fancy picture off the Internet. The best is to find a really small texture and to tile it.
91. For the Virtual Memory setting in Windows (right-click on My Computer, Properties, Advanced, Performance Settings, Advanced, Virtual Memory), make sure the MIN and MAX are both the same number.
92. If you search on Google a lot or Wikipedia, you can do it much faster on Vista by adding them to the Vista Start Menu Instant Search box.
93. If you have a custom built computer or a PC that was previously used, make sure to check the BIOS for optimal settings such as enabled CPU caches, correctly set IDE/SATA data transfer modes, memory timings, etc. You can also enable Fast/Quick boot if you have that option.
94. If you have a SCSI drive, make sure the write cache is enabled. You can do so by opening the properties of the SCSI drive in Windows.
95. If you have a machine with an older network card, make sure to enable the onboard processor for the network card, which will offload tasks from the CPU.
96. If you are using Windows Vista, you can disable the Welcome Center splash screen that always pops up.
97. If you already have anti-spyware software installed, turn off Windows Defenderprotection.
98. If you are running a 32-bit version of Windows and have 4GB of RAM or more, you can force Windows to see and use all of the RAM by enabling PAE.
99. Buy a new computer!!! 
Pretty easy eh?
I’m sure I have missed out on lots of performance tweaks, tips, hacks, etc, so feel free to post comments to add to the list! Enjoy! and please follow our site if you feel our info was helpful to you.
Your computer running Windows isn’t running in the same speed that it used to run when you first used it. It’s slower, crappy, takes a while to start and tests your patience like anything. There are many reasons for this, let’s try fixing up a few things on your slow Windows PC:
Slow Send To Menu
If the My Computer Window loads slowly, in the Explorer Window, go to Tools >> Folder Options >> View and uncheck ‘Automatically search for network folders and printers”