I have had a problem that started some time ago, 6 months maybe. I should have noted the first instance but I didn't. I am using Windows 7 Pro, 32bit. Under normal circumstances I can open up the the Task Manager, via the task bar or cntrl alt del. When I get a program stuck, causing a freeze or non-responsive system I try to open the task manager. I have to force a restart by powering off. It will not work. I have had plenty of similar problems in the past and I had no trouble getting it open. I have searched the internet but the only results I can find are when the task manager will not start under any situation. I am running ESET NOD32 as the anti-virus. The latest example happened when I opened a new tab in Google and tried to copy an image. Google accounts for at least 50% of the examples. Ran System File Checker tool, sfc /scannow as recommended on another post. No errors returned. Any guidance would be appreciated.
Because your question lacks enough detail, I'll try and suggest a variety of approaches to resolve this or rule out causes:
Quick check first; to help you determine if your current OS installation is playing a role in the problem:
Next round of steps; if you were not able to re-create the freeze on a clean OS.
If your system is completely frozen;
If your system is not completely frozen (just running really really slow) and just task manager just doesn't come up.