Crash at windows timer routine
Two minidumps are crashed at windows timer routine and they are the sign of hardware error. One minidump is crashed with 1 bit memory corruption. Obviously it is faulty RAM.
Suggestion
1. Reseat the memory module to another memory slot
2. Clean the dust inside the PC
Mini042206-01.dmp BugCheck 1000007F, {8, 80042000, 0, 0}
Probably caused by : win32k.sys ( win32k!DoTimer+78 ) <-- Crash at timer routine
Mini042206-02.dmp BugCheck 10000050, {e1ebc0f4, 0, f76420ff, 1}
Probably caused by : avg7rsxp.sys ( avg7rsxp+196f )
Mini042506-01.dmp BugCheck 1000000A, {4, 2, 0, 804e8529}
Probably caused by : memory_corruption ( nt!MiUnlinkPageFromList+58 )
Mini042506-02.dmp BugCheck 10000050, {b7f44e5b, 1, f76622f5, 0}
Mini042506-02.dmp DEFAULT_BUCKET_ID: CODE_CORRUPTION
Probably caused by : memory_corruption <-- 1 bit memory corruption
Mini041306-01.dmp Bugcheck 1000000A, {00000000, 1c, 1, 804e163c) <-- Crashes at timer routine