Ok, so you can reinstall AVG if that is not the problem.
There is a minute possibility that you have a MBR infection that dodged the aswMBR scan, but it is more likely that your computer is clean and there is some other conflict that is bugging you.
If you want to be completely sure that you do not have an MBR infection, do this:
====================Download
MBRCheck by
a_d_13 from either of the following mirrors and save it to your system disk (probably
C:\).
We are going to create a boot CD to help us with your problem.
- You will need a blank CD to burn the boot CD
- Download OTLPEStd.exe by OldTimer from here (a big download)
- Double-click on OTLPEStd.exe to burn the boot CD
- Reboot your system using the boot CD you just created. If you don´t know how to boot from CD, check out this page
- Booting will take quite some time, so please be patient
- Finally you should see the REATOGO-X-PE desktop.
- Browse to your system disk, run mbrcheck.exe and post the resulting log back here.
====================If this comes up clean, as I think it will, probably you are going to have to troubleshoot a bit. I´m no expert in windows troubleshooting, but what I would do is to try and uninstall some of the software you have installed and see if this has a positive effect.
In the OTl log you can find active processes on your computer - might try out and see if either of those is causing problems.
PRC - [2011/11/15 07:36:54 | 000,584,192 | ---- | M] (OldTimer Tools) -- H:\OTL.exe
PRC - [2011/10/12 11:23:54 | 000,247,968 | ---- | M] (Adobe Systems, Inc.) -- C:\Windows\SysWOW64\Macromed\Flash\FlashUtil11c_ActiveX.exe
PRC - [2011/06/06 11:55:28 | 000,064,952 | ---- | M] (Adobe Systems Incorporated) -- C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\armsvc.exe
PRC - [2011/03/28 16:07:50 | 000,094,264 | ---- | M] (Hewlett-Packard Company) -- C:\Program Files (x86)\Hewlett-Packard\Shared\HPDrvMntSvc.exe
PRC - [2011/03/09 18:24:44 | 002,708,024 | ---- | M] (AVG Technologies CZ, s.r.o.) -- C:\Program Files (x86)\AVG\AVG10\avgfws.exe
PRC - [2011/02/28 17:44:14 | 000,391,432 | ---- | M] (Microsoft Corporation.) -- C:\Program Files (x86)\Microsoft\BingBar\BingBar.exe
PRC - [2011/02/28 17:44:14 | 000,259,336 | ---- | M] (Microsoft Corporation.) -- C:\Program Files (x86)\Microsoft\BingBar\BingApp.exe
PRC - [2011/02/25 09:46:22 | 000,249,648 | ---- | M] (Microsoft Corporation) -- C:\Program Files (x86)\Microsoft\BingBar\SeaPort.EXE
PRC - [2011/02/23 16:11:22 | 000,323,584 | ---- | M] (Eastman Kodak Company) -- C:\Program Files (x86)\Kodak\Kodak EasyShare software\bin\EasyShare.exe
PRC - [2011/02/18 10:47:12 | 000,079,192 | ---- | M] (Research In Motion Limited) -- C:\Program Files (x86)\Common Files\Research In Motion\USB Drivers\RIMBBLaunchAgent.exe
PRC - [2011/01/12 17:00:42 | 000,013,336 | ---- | M] (Intel Corporation) -- C:\Program Files (x86)\Intel\Intel(R) Rapid Storage Technology\IAStorDataMgrSvc.exe
PRC - [2011/01/12 17:00:38 | 000,283,160 | ---- | M] (Intel Corporation) -- C:\Program Files (x86)\Intel\Intel(R) Rapid Storage Technology\IAStorIcon.exe
PRC - [2010/12/13 13:48:18 | 000,318,520 | ---- | M] (Hewlett-Packard Development Company, L.P.) -- C:\Program Files (x86)\Hewlett-Packard\HP On Screen Display\HPOSD.exe
PRC - [2010/12/10 23:02:24 | 000,136,488 | ---- | M] (CyberLink) -- C:\Program Files (x86)\CyberLink\YouCam\YCMMirage.exe
PRC - [2010/12/07 06:06:00 | 000,249,672 | ---- | M] (HP) -- C:\Program Files (x86)\HP SimplePass 2011\TrueSuiteService.exe
PRC - [2010/12/07 06:05:52 | 000,634,696 | ---- | M] (HP) -- C:\Program Files (x86)\HP SimplePass 2011\TouchControl.exe
PRC - [2010/12/07 06:05:38 | 000,142,664 | ---- | M] (HP) -- C:\Program Files (x86)\HP SimplePass 2011\BioMonitor.exe
PRC - [2010/11/24 22:26:40 | 000,075,048 | ---- | M] (cyberlink) -- C:\Program Files (x86)\CyberLink\Shared files\brs.exe
PRC - [2010/11/23 11:26:48 | 002,656,280 | ---- | M] (Intel Corporation) -- C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\UNS\UNS.exe
PRC - [2010/11/23 11:26:44 | 000,325,656 | ---- | M] (Intel Corporation) -- C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\LMS\LMS.exe
PRC - [2010/11/17 10:53:16 | 000,113,288 | ---- | M] (Renesas Electronics Corporation) -- C:\Program Files (x86)\Renesas Electronics\USB 3.0 Host Controller Driver\Application\nusb3mon.exe
PRC - [2010/11/09 16:20:36 | 000,586,296 | ---- | M] (Hewlett-Packard Development Company, L.P.) -- C:\Program Files (x86)\Hewlett-Packard\HP Quick Launch\HPMSGSVC.exe
PRC - [2010/11/09 16:20:34 | 000,026,680 | ---- | M] (Hewlett-Packard Development Company, L.P.) -- C:\Program Files (x86)\Hewlett-Packard\HP Quick Launch\HPWMISVC.exe
PRC - [2010/10/27 18:17:52 | 000,207,424 | ---- | M] (ArcSoft Inc.) -- C:\Program Files (x86)\Common Files\ArcSoft\Connection Service\Bin\ACDaemon.exe
PRC - [2010/07/29 19:39:24 | 000,013,600 | ---- | M] (Broadcom Corporation.) -- C:\Program Files\WIDCOMM\Bluetooth Software\BluetoothHeadsetProxy.exe
PRC - [2010/03/18 10:19:26 | 000,113,152 | ---- | M] (ArcSoft Inc.) -- C:\Program Files (x86)\Common Files\ArcSoft\Connection Service\Bin\ACService.exe
PRC - [2010/02/03 00:08:56 | 000,087,336 | ---- | M] (CyberLink Corp.) -- C:\Program Files (x86)\CyberLink\PowerDVD10\PDVD10Serv.exe
PRC - [2008/06/09 23:00:00 | 000,032,768 | ---- | M] (Sage Software) -- C:\Program Files (x86)\winsim\ConnectionManager\Simply.SystemTrayIcon.exe
PRC - [2008/06/09 23:00:00 | 000,024,576 | ---- | M] (Sage Software) -- C:\Program Files (x86)\winsim\ConnectionManager\SimplyConnectionManager.exe
====================Another tool you could try and use is
Process Explorer. When your computer hangs, maybe you can see which process is taking up 100% of your CPU.