The "zWrlk2v89.exe" file you're referring to is located in the Temp folder, which is often used by programs for temporary storage. It's unusual for a .exe file to be there. It could potentially be malicious. If your explorer freezes when trying to analyze it, it's a red flag. I recommend running a full system scan with your antivirus software. Also, consider using a tool like Process Explorer to kill the process if it's running.