Minidump error crashing PC randomly

Hello there - hoping someone can help me identify what might be causing my Dell to randomly restart and it gives me a minidump error. I ran the SF Diagnostic Tool as instructed and the zipped folder is below:

Thanks in advance for the assistance!

your DELL computer came with PCDoctor pre-installed on it and this is the run-time module that looks for certain "updates" or "fixes" it thinks is needed by your computer.

Suggest uninstalling pcdoctor, clean with ccleaner, then double-check and make sure that module is not enabled in your start-up options, use ccleaner and look at all start-up tabs.

Thank you for the advice on the CCleaner - that cleaned up a lot of stuff off my PC! I followed your advice the day I got it and everything seemed to be fine since then but about 30 minutes ago while I was out doing something I came back to find the PC had another minidump error and restarted. I believe I cleaned up all the PCDoctor stuff so it must be something else? What would advise me to try now and should I run another SF Diagnostic and post it?

Yes, Please re-up another. and BTW, uninstall AVAST. Windows Defender is good enough and in addition, turn off Autorun

Win+X -> Run and type gpedit.msc

Administrative Templates >Windows Components > Autoplay Policies , double click "Turn off Autoplay", Next is click Enabled, and then select All drives so that you can disable Autorun on all drives.

OK - here's another run on the SF tool. I tried to run gpedit.msc but its not available on my version of Windows 8 or so it looks like.

Ok I had another crash - I ran another SF and attached the file

Your recent BSOD's are caused by pcw.sys. Did you completely uninstall the anti virus software as suggested above ?

I don't see anything called AVAST - is it known as something else?

Silly me !!! I mean AVG Anti virus 2013. Sorry about that.

Please use this tool to uninstall: Download tools and utilities | AVG Worldwide

I deleted AVG a couple days ago. I had another crash/reboot today so I ran another SF Tool and attached it. Thanks again for all the help!