Error when installing updates with VPS file from avast website

Avast Free Antivirus / Premium Security
1

My client has reported this error to me from an avast! 4.8 installation.

Can’t install VPS update.
Please report the following error codes
ver: 4.8.1335
SI: 0x20000011
ST:0xFFFFFFFF
LE:0X00000000

Please what could be the problem?

thanks

I