As I said before, it leaves all installed APPLICATIONS (this is NOT the Windows OS or anything in Add/Remove WINDOWS Components) and any Registry Settings for said Applications.
In addition, it leaves ANY Registry settings for any Hotfixes/Updates in Add/Remove Programs (where you ALSO see Applications). This will NOT include "hidden" Hotfixes (I mentioned that too - they are found in "Programs->Accessories->System Tools->System Information" and may not include ALL Hotfixes. SOME are NOT visible ANYWHERE (MS Hotfixes, particularly).
Any Internet Explorer Upgrades will also be present EXCEPT those components in that PACKAGE that are "overlaid" by an OS Reinstall.
Some/Any "Unofficial Hotfixes/Updates" that RENAME Original Windows Components (this means INDIVIDUAL FILES) may NOT be "reinstalled" due to (e.g.) "component.old" still existing (this would have been the ORIGINAL Windows Installation Component that was saved for the purpose of UNINSTALL (you will see those items STILL EXISTING in Add/Remove Programs).
That is why I said YOU MUST isolate ALL "renamed" Components and REMOVE the (e.g.) "something.old" (or whatever) AND the Associated Add/Remove entry within the Registry and DELETE or MOVE them elsewhere.
If the above steps are not taken, you will have a BAD time reinstalling anything above and beyond the Reinstall.
In addition, MANY Application Installs MAY install a NEWER version of "component.xxx" (an ORIGINAL Windows file), therefore the Application will incorrectly function.
ISOLATE the not-Originals and MOVE them elsewhere, FIX the Registry, and Reinstall any Applications. THEN the "Hotfixes/Updates" (official and unofficial) may be reapplied.
A tedious operation. The "list" of greater-than-"04/23/1999" is what you are looking for...
If you're not concerned with anything on the HDD, FORMAT and REINSTALL (start from scratch). Reinstall any Applications, then apply the appropriate Hotfix "packages".
Backup you DATA if you don't want to lose it. Find any DRIVERS you may need and have them ready. Have Application Install Packages (e.g. Nero) and Keys offloaded and ready to reinstall.
This post has been edited by submix8c: 17 January 2012 - 11:10 PM