Here are some steps to try if your PC is frozen:

1. Restart your computer. This is the most common solution to this type of problem and can typically solve the issue in a few minutes.
2. Check your computer's RAM for any errors. If there are, you may need to repair or replace the RAM.
3. Check your computer's hard drive for any errors using a disk checking software, and repair any you find.
4. If the problem persists after attempting these solutions, consider reinstalling your operating system.