Basic security practices
Stronger security practices
Do you really need to re-install Windows to get the performance back?
Do you need to "clean" the registry?
What's the impact of 'registry bloat'?
The Microsoft PFE Performance Guide. Consult this carefully if you suspect performance issues.
Download Windows ISO image
Personal use licensing for Windows.
Reset a (lost) Administrator password
Replacing lost Windows install disks
Deleting a locked or in-use file
Formatting a FAT32 partition
Microsoft Trial Software
Troubleshooting the blue screen of death (BSOD).
Identifying whats using space on a windows machine.
Understanding Windows File And Registry Permissions
Understanding Windows memory management with Mark Russinovich part 1 and part 2
Recovering the Windows (Vista +) Bootloader
Windows Timeline (history of Windows OS releases)
How much disk space does Windows consume?
Relocate Users directory.
Relocation of Program Files not recommended.
Windows Error Reference
Windows Update troubleshooter