I wouldn't imagine you would have to reinstall for these problems. Sorry that your last thread was overlooked. It get's pretty busy around here.
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Run HiJackThis then:
1. Click "Open the Misc Tools Section"
2. Click "Open Process manager"
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Next, while holding down the CTRL key, locate (if present) and click on (highlight) each of the following:
C:\WINDOWS\MYTZENC.EXE
Now double-check and make sure that only those item(s) above are highlighted, then click "Kill process". Now, click "Refresh", check again, and repeat this step if any remain.
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Still in HiJackThis, click "Scan", then check(tick) the following, if present:
R3 - Default URLSearchHook is missing
O2 - BHO: (no name) - {70668828-A43B-D960-70D2-82B478392A64} - C:\Program Files\cdmdownld\cojppsugpj.dll (file missing)
O4 - HKLM\..\Run: [Sysnet] C:\Documents and Settings\Owner\snuninst.exe
O4 - HKLM\..\Run: [seeve] C:\WINDOWS\seeve.exe
O4 - HKLM\..\Run: [motoin] C:\WINDOWS\mm15201518.Stub.exe
O4 - HKLM\..\Run: [exp.exe] C:\WINDOWS\system32\exp.exe
O4 - HKLM\..\Run: [2ca4d36019e4] C:\WINDOWS\system32\aaaamon0.exe
O4 - HKLM\..\Run: [MYTZENC] C:\WINDOWS\MYTZENC.EXE
Now, with all windows closed (including Internet Explorer) except HiJackThis, click "Fix checked".
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Locate and delete the following item(s), if present. Make sure your able to view system and hidden files/ folders:
files...
C:\WINDOWS\MYTZENC.EXE
C:\Documents and Settings\Owner\snuninst.exe
C:\WINDOWS\seeve.exe
C:\WINDOWS\mm15201518.Stub.exe
C:\WINDOWS\system32\exp.exe
C:\WINDOWS\system32\aaaamon0.exe
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Note that some of these file(s)/folder(s) may or may not be present. If present, and cannot be deleted because they're 'in use', try deleting them in " Safe Mode ".
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Reboot.
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After rebooting, rescan with hijackthis and post back a new log. Let me know how everything goes.