Blank screen on start up - Microsoft Community

ran aol's "system mechanic", on start have black screen trash can icon, , error  message desk top not available, has been moved or erased. how can recover desktop?

answer-by-number:

1. did computer come win10 preinstalled, did you clean install of win10, or did upgrade win7 computer or win8.1 computer [<=pick one!] to win10?

2. manufactured computer (e.g., dell; hp; acer; lenovo; asus)?

3. has norton application or mcafee application ever been installed on computer since bought it?

4. have ever run norton removal tool and/or mcafee consumer products removal tool?

5. version & os build of windows 10 is installed?

• press & hold windows key , press the r key. in the run dialog, type winver , press the enter key.

6. have backups of changes system mechanic has ever made computer?

• injudicious use of registry cleaners may playing role here. tip: if ever again think registry needs cleaned, repaired, boosted, tuned-up, cured, tweaked, fixed, maximized, "swept" or optimised (it doesn't), read article , this older  (but still valid) one (and related links cited therein) draw own conclusions. related => http://support.microsoft.com/kb/2563254

Windows / Windows 10 / Windows update, recovery, & backup / PC