I had the same issue with blank screen after pressing the perform button since a long time - last test today with current version 4.2.0.1.
In my case the Cache folder on z:\win is on remote network share \\server\download and i start PatchMyPC from a none admin account.
To solve this problem i start first a cmd with admin right. net use show that cache location is not available.
Just solved this by using "net use z: \\server\download" and start PatchMyPC from this command line.
And now PatchMyPC running well
In my case the Cache folder on z:\win is on remote network share \\server\download and i start PatchMyPC from a none admin account.
To solve this problem i start first a cmd with admin right. net use show that cache location is not available.
Just solved this by using "net use z: \\server\download" and start PatchMyPC from this command line.
And now PatchMyPC running well
![Smiley :)](https://patchmypc.com/forum/Smileys/default/smiley.gif)