a.exe

File a.exe is malware or can be infected by malware:
Bridge Trojan, PSW.Bancos Trojan, Win32.Spy.Briss Trojan, Clagger Trojan, Vundo (Virtumondo) Trojan, SpyDldr.J Trojan, Autorun Malware Malware, Smitfraud.c Trojan
You must run antivirus software as soon as posible to check you computer.Also Be Aware of this dangerous files:

polall1m.exe File
gsiezgig.dll Cleaner
epopckpa.dll Removal instruction
ghejqzuq.dll Removal instruction
UA27215.DLL virus