MTS to AVI Converter: [Solved] Click "open"; nothing happens.

Click "open"; nothing happens.

Symptoms:
1) left-clicking attachments to emails gets the dialogue box with "open" and "save". Clicking "open" closes the dialogue box, but nothing opens and no error messages. True for Word and .pdf files, and, yes, I have Word and Adobe reader.
2) clicking "save" (or "save as") will get the document in my file. But after saving, a dialogue box appears asking if I wish to "open." Clicking "open" again makes the dialogue box go away, but nothing opens.
3) same thing happens with files downloaded from a legal database. I can save the file, but the "open" button just vanishes with nothing actually opening.
4) similar thing happened when trying to download latest Adobe reader--I got the "run" or "save" boxes. Clicking "run" did nothing. I could save the file, and then open the file and the program loaded.
5) possibly related: at roughly the same time this happened, I lost the ability to print .pdf files from Acrobat. Error message said nothing was selected to print, but of course, it was.

Very annoying. Any help would be appreciated.
Thank you,

Solutions to the Problem Click "open"; nothing happens.

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It sounds like you could have a virus or other malware.
Get your antivirus program up to date and boot into
Safe Mode.
Note that some viruses can hide themselves from your antivirus program in normal mode, so you really need to scan in
Safe Mode.
To get into Safe Mode when you first power up, hit F8 about once a second until you get the menu and select Safe Mode.
Then run a full system scan.
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Microsoft has suggestions and offerings at
http://windows.microsoft.com/en-US/windows7/how-do-I-remove-a-computer-virus
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Forum moderator Keith has some suggestions along this line at
http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/windows-explorer-has-stopped-working/6ab02526-5071-4dcc-895f-d90202bad8b3
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If that fixes it, fine.
If not, use System Restore to go back to a date prior to the beginning of the problem.
To run System Restore, click Start -> Programs -> Accessories -> System Tools -> System Restore.
Click the box that says
Show more restore points.

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You can check for corrupted system files.
Open an administrator command prompt and run SFC if the above doesn't help.
Click START, then type
CMD in the search box, right-click CMD.EXE and click Run as administrator.
Then from the command prompt type
sfc /scannow.
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Finally if all else fails, you can check the rather cryptic system event log.
To do so click Start -> Control Panel -> Administrative Tools -> Event Viewer.
Once in Event Viewer click on the system log and scroll through the entries looking for those flagged
"error" to see if you can find hints as to where the problem could be.
`
When you get your system back in good working order, I urge you to back your system up to an external hard drive and make regular periodic updates to it.
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I hope this helps.
Good luck.

System Restore - Fix All Errors including Click "open"; nothing happens.

Click on the Start button on the Taskbar.
Type "System Restore" (without quotes) in the Search box and hit Enter or,
Click on System Restore (when you see System Restore pop up in the list of search results).
Make sure the "Recommended restore" radio button is checked on the restore utility window.
Click on Next and follow the instructions given.

Note: There is the option on the restore utility to select "Choose a different restore point". Unless you have a specific reason to select a different date and time than what Windows recommends, just select the recommended option stated in the steps above. If you choose to select another one, follow these steps:

Click on that desired date and time, and Windows 7 will perform a scan for any affected programs in that restore point.

Once completed, click Next and follow the instructions given.

Once you have selected the restore point, your system will start the restoring process, after which you will have to restart the system.