Like normal people, I was never into the squeeze-every-kilobyte-out-of-my-operating-system-installs fad. It’s not a process that really yields any tangible benefit, yet people still do it -- with a tool called vLite. On Tuesday, Microsoft issued a note to users, of “v-Lited” Windows Vista SP1 installs, having issues upgrading to SP2. Their advice? Reinstall Windows with genuine media. You know, the one full of carbs. Check out the support article after the quote below.
This problem occurs because system components that are required to install Windows Vista SP2 are not present on your computer. However, a common reason for this problem is that the vLite software was used to customize the Windows Vista installation and some required system components were removed.