Troubleshooter of Error: Computer crashes after i've logged in on normal boot up mode - Urgent(!)

Computer crashes after i've logged in on normal boot up mode - Urgent(!)

Hi, i've got a problem with my pc ( which is a HP pavilion g6 ) and the problem is like this: whenever i try booting the pc up in normal mode, everything goes fine and i get to the log in screen.
after i've logged in and i get to my desktop, i can't do
anything, after a little while, the entire screen turns transparent grey ( like if ur browser isnt responding ) and then it wont let me do anything.

it was working fine before and then i had to go for like 1 hour or so, and when i returned the browser was slow and i could only have 1 page up.
then i looked at my desktop and in my right lower corner it said "invalid copy of windows 7", however i do got a valid and legal bought copy of windows 7.
so i tried re-booting it but that just made things worse, thats when the problem accured that i can't
get it to do anything once i've logged in.
however i can boot up in secure mode and then it works fine.
(well..
fine and fine, secure mode got limits and such)
i've tried to recover the computer like how it was two days ago using the recovery tool.
however that doesn't seem to work either.

please respond as soon as possible, this is urgent since i've got my exam weeks coming up.

Solutions to the Problem Computer crashes after i've logged in on normal boot up mode - Urgent(!)

Download Error Fixer (Free)

Manually editing the Windows registry to fix Error Computer crashes after i've logged in on normal boot up mode - Urgent(!)

Caution: Unless you an advanced PC user, we DO NOT recommend editing the Windows registry manually. Using Registry Editor incorrectly can cause serious problems that may require you to reinstall Windows. We do not guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

• Click the Start button.
• Type "command" in the search box... DO NOT hit ENTER yet!
• While holding CTRL-Shift on your keyboard, hit ENTER.
• You will be prompted with a permission dialog box.
• Click Yes.
• A black box will open with a blinking cursor.
• Type "regedit" and hit ENTER.
• In the Registry Editor, select the Error 0x9C-related key (eg. Windows Operating System) you want to back up.
• From the File menu, choose Export.
• In the Save In list, select the folder where you want to save the Windows Operating System backup key.
• In the File Name box, type a name for your backup file, such as "Windows Operating System Backup".
• In the Export Range box, be sure that "Selected branch" is selected.
• Click Save.
• The file is then saved with a .reg file extension.
• You now have a backup of your MACHINE_CHECK_EXCEPTION-related registry entry.

Recommended Method to Fix the Problem: Computer crashes after i've logged in on normal boot up mode - Urgent(!):

How to Fix Computer crashes after i've logged in on normal boot up mode - Urgent(!) with SmartPCFixer?

1. Click the button to download Error Fixer . Install it on your system.  Open it, and it will perform a scan for your system. The junk files will be shown in the list.

2. After the scan is finished, you can see the errors and problems which need to be fixed.

3. The Repair part is done, the speed of your computer will be much higher than before and the errors have been fixed. You can also use other functions in SmartPCFixer. Like dll downloading, windows updating and print spooler error repair.

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