1

Download 360 system first aid kit

Win7 download 360 software shows that the signature is damaged or invalid.

2

Open the file in the file after downloading.

Win7 download 360 software shows that the signature is damaged or invalid.

three

Open it, and then click Start.

Win7 download 360 software shows that the signature is damaged or invalid.

four

Start cleaning with cleaning tools.

Win7 download 360 software shows that the signature is damaged or invalid.

five

The problem will be solved after cleaning.