SinPi
SpybotSD does work quite OK with free AVG 7.5, and with the current version of Avast! at least on XP, I don't have Vista so I can't comment. Yes there were/are problems with AVG 8.
Your screen shots of the exception dialogues appear to be superimposed over the top of a Spybot web page, yet your earlier posts said the problem was occurring at shutdown. Has the situation now changed?
You didn't say whether you tried my suggestion about taking a new snapshot of the startup entries. If you did, was it before or after you uninstalled AVG 7.5?
Do you have any antivirus installed right now? I hope you are not using the computer online with no antivirus installed.
To try to stabilise the situation, please start SpybotSD, go into Advanced mode, go to Tools, double click on Resident and remove the tick on Resident Teatimer. Exit Spybot and reboot. Teatimer should no longer be active.
Now if you don't have antivirus software installed, reinstall AVG 7.5 if you still have it. Once it has been installed and updated, do a full scan with AVG 7.5 first and correct any problems it finds. When the antivirus scan is clear, do a full scan with SpybotSD and try to remedy any problems it finds. When everything is clear, do a reboot then make a new snapshot of the startup files as per the earlier details. After this has been done, and perhaps a final reboot for luck, try re-enabling Teatimer.
Hope this helps
PS. Whilst I use and like Avast!, it arguably has a slightly higher learning curve than AVG 7.5, and for best results you would need to upgrade it to the latest beta or pre-release version 4.8.1192. Because you are familiar with AVG 7.5 it's perhaps best to stay with that until you get the current problem sorted out.