When you first choose to download PCCare™, you will typically see a warning similar to this.

We recommend you choose Save, You will then be presented with a dialog asking you where you want to save the installer program. We recommend simply using the defaults (either my-downloads or desktop). The download will begin, your antivirus program may run a scan on the file when it is complete. After the download, you will be prompted to run the program. You may get another security warning:

Choose Run to install PCCare™.
Once the installer has started, other
security system software such as anti-spyware or other security products may
detect changes to your system as part of the installation process.
As you are installing the PCCare™ product, accept the changes for setup.exe, cust.exe, PCCare™, and Client.
This shows an example from Spybot Search
and Destroy, you will see a similar message from McAfee Privacy, Norton
Internet Security, Spysweeper or any other security program.
You may get one message for the entire
application (for example Norton) or you may get individual messages for each
registry change (Spybot). Accept
them as they occur.
Next when running the program, a firewall (for example eTrust EZ Armor, Norton Internet security, McAfee Privacy and Firewall or MS Firewall) will ask you if you want the program to access the internet or act as a server. Please select UNBLOCK or ALLOW (always).
Select Unblock
The same message from Norton Internet Security.