Here, avast detected a Malware in this folder path on windows 7. C:\ProgramData\Microsoft\Crypto\RSA64\temp The file named was tmp4C7A. exe
Now, I am not sure how it got there despite the resident shield being on the ON state. Nevertheless, it detected the file as a virus few times but couldn't seem to have deleted it. So, I ran boot time scan. It deleted the file. However, now I do not know if it had deleted an important system file. So far there is no problem as such so I guess, it was not that important. There is another file of similar type named tmpE495. exe which is clean.
I just hope everything is fine. You could run a boot scan and see if it solves.