All software linked to from this page is completely free and extremely useful.
[avg free]AVG Anti-Virus Free Edition is one of the most popular solutions to provide basic security protection on home and non-commercial PCs. Millions of users around the world rely on AVG's unique award-winning detection methods by downloading AVG Anti-Virus Free Edition.
[driver max]
DriverMax is an extremely useful program which allows you to easily reinstall all your Windows drivers. Simply export all your current drivers (or just the ones that work ok) to a folder or a compressed file. After reinstalling Windows you will have everything in one place.
[registry cleaner]
During the normal operation of a Windows system, registry data is constantly being written to and removed from the registry. Over time this data becomes scattered within the registry file and when information is deleted from the registry holes are left which fragment the data within the registry. Registry compacting optimizes your registry by removing gaps and wasted space, thus improves the whole system performance.
BE AWARE!