SymSrv.dll is a legitimate DLL file associated with the Microsoft Windows operating system and Symantec's Norton software. It's used for various purposes, including debugging and error reporting.
This Malware is Hard To Remove symsrv.dll - Malwarebytes Forums symsrvdll virus removal tool link
If you're comfortable with manual removal, you can try the following steps: SymSrv
Standard antivirus programs sometimes fail to fully clean Floxif because it resides in the AppInit_DLLs symsrvdll virus removal tool link
: A built-in Windows utility. Press Win + R , type mrt , and run a Full Scan. Step-by-Step Removal Process