I to have seen this error but after running the Windows drive integrity cheek-er I have not see it since, I don't think that the error has really got any thing much to do with TG2 (IMHO) but rather it is an internal error thrown up by windows, just an opinion I'd like to venture.
The time I saw this error was after shutting down IE7 and turning the modem off for the night, the last time I saw the error was some weeks ago now and I haven't seen it since.
Regards to you.
Cyber-Angel