I got a pop-up from Comodo firewall asking me if i wanted to run INSTALL.DLL in the sand box.
I don’t really know what program is using INSTALL.DLL

Does anyone know if INSTALL.DLL is a legitimate process and what legitimate programs may be using it?

Thank you in advance for your help

It could be malware according to .

Start with scanning your system following What to do if you’re infected - eXPerience Rev.3 or submitting it to Virus Total for a verdict on its nature.

I have scanned the computer with three good antivirus/maleware programs a they found no problems

What OS are you on? May be it got started by rundll32.exe: .

I am using XP Home SP3