I have a big problem with QTP. It suddenly stop opening any ready test. I can create new test and work on it. New test could be save, open and there is no problem with it. But when try to open old test (create before) QTP open it one time and it works. When try to open another test QTP fail to open it and processor become on 100% usage. I should to kill the process to stop QTP. When I run QTP again it can not open any test and need to restart the PC. Then it's the same. Only one time to open test.
I try to reinstall the QTP and also install on another PC, but everything is the same.
Check out the "QTP FAQs & Useful links" section in this forum the line item 37 "How to perform a clean uninstall" it's a long process but it worked for me (better than what I got from IBM tech support!)
We team have been got into this before. But I am not sure whether it is same with your problem.
I found there is a problem with size of the mts file[Script.mts] in that file's directory. It's bigger than usual. I rewrite the mts file with NOTEBOOK and change it.
The old test can be opened successfully.