A kernel timer or DPC was found in memory which must not contain

[FaultWire]

Details:
A kernel timer or DPC was found in memory which must not contain such
items. Usually this is memory being freed. This is usually caused by
a device driver that has not cleaned up properly before freeing memory.

Fatal Bug Check Code - STOP: 0x000000C7

Windows: 2000, XP, Vista, 2008, 7
Vendor: Microsoft Corporation

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[Trotty]

I had this BSOD message while trying to install Windows 7 (after wiping my hard drive due to random rebooting/hanging and AVG not opening). I also had another BSOD message saying: a clock interrupt was not received on a secondary processor within the allocated time interval.

I can't install Windows, so have no access to minidumps, etc.

I don't know if it's a bad version of Windows (I've used it before and it worked fine until recently), or hardware related (I had to change my motherboard, ram and graphics card recently).

Any suggestions?

Thanks in advance.