3
First - I have gone through as many possible solutions I've found here and elsewhere.
[Edit - to describe the issue in more detail, the PC appears to boot correctly, but instead of the logon screen, I have been getting a black screen WITH the pointer cursor, and it responds correctly to the mouse. Pressing CTL-ALT-DEL brings up the logon screen's background, but with no logon area nor any other content. This screen was at the full resolution before I uninstalled the graphics driver in safe-mode.]
I also just ran a full up-to-date AVG scan from boot media.
[Edit - the AVG scan, which was updated to today's virus signatures, found no issues at all.]
So - steps I've tried:
- Safe Boot, Restore from before the issue - done, no help.
- Uninstall the graphics driver - done, now i have a 1024x768 fallback screen, still no way in.
- sfc /scannow - only doable from Safe boot obviously, but no change.
- [Edit - booting from restore media, performing a startup repair and...]Restore further back - restored to 2 days ago, and I'd had many reboots since then with no problem.
- Enable autologin to try to get beyond the login screen - done, doesn't work.
It seems the best advice is complete reinstall, but I really don't want to do that because it'll take 3-4 days to add all the apps I use.
Some key points to note - in both states - before and after removing the video driver, I always had a mouse cursor on the screen. CTL-ALT-DEL flashes up the login background, but no login info.
I can (and often do) reinstall from scratch, but was at a fairly stable state before this, and would prefer not to.
-Paul
@PJC, I would recommend try uninstall AVG & see
– pun – 2015-08-16T02:27:12.727Since you've determined that you don't suspect malicious software at hand, enabling Administrator Command Prompt may prove helpful. Several password crackers, KonBoot being my favorite, have built-in features where cmd with the highest privileges can be accessed with sticky keys after booting. If you don't currently have access to Administrative privileges, this could help. – Shankensteinium – 2017-05-24T22:06:01.397
Can the mouse cursor move off the edge of the screen? It sounds almost like there's a "virtual" monitor that is being marked as primary and the login and ctrl+alt+del content show up there instead of on your actual monitor – reffu – 2018-03-13T13:14:02.797
I assume you have removed the video driver completly. – Ramhound – 2012-12-21T16:07:31.197
@ramhound yes, and when i do boot fully back I'm now in fallback 1024x768, with exactly the same behaviour - ie black screen, with cursor, ctl-alt-del temporarily brings up the login screen background. – PJC – 2012-12-21T16:19:38.330
Have you tried to boot with a Widows 7 disc to do a repair? – CharlieRB – 2012-12-21T17:48:58.217
@CharlieRB - yes - I should amend the question - the second rollback was from boot media, and after a startup repair. – PJC – 2012-12-21T17:56:38.623
can you bring up task manager with ctrl+shift+esc? – BroScience – 2012-12-21T18:33:12.077
@BroScience - nope - on the black screen (with mouse pointer, which works), CTL-ALT-DEL brings up the logon background temporarily, CTL-SHIFT-ESC does nothing. Also tried CTL-SHIFT-ESC during the time the background is up, and still nothing. Mouse still works :( – PJC – 2012-12-21T18:42:03.680
1Have you tried to
chkdsk
the system drive? – gronostaj – 2013-05-06T13:18:33.430