You have no doubt researched this but I will post this for others...
Error code 0xC0000005 is a general access violation error, indicating that a program is trying to access memory it’s not allowed to. This issue often involves problems with permissions, corrupted files, or conflicting software. The reference to kernelbase.dll in the Windows Event Log indicates that this issue might be related to the Windows kernel or system libraries.
Given this, do you have any code in place to verify if the file already exists and the path is valid in each case? Issues with the computer running the tests should not be ruled out completely. Wrtting some code to loop and perform file system tests within TestComplete would be a good idea just to rule out issues with your tested app and the pc.
Ref: https://support.smartbear.com/testcomplete/docs/reference/program-objects/aqfilesystem/index.html?sbsearch=aqFileSystem
Good luck! Check back and let us know what you find!
P.S. If you find my posts helpful give me a like and be sure to mark a 'Best Answer' to give credit and help others with the same questions!