Sorry to hear you are having issues.
As you might expect, we don't see what you guys are. Also, from the reports, it's only a very very small amout of people that are seeing it. That is actually worse, we would rather a lot of people were - more people = more data.
With that, we need your help in figuring out what it is. For the willing, we have devised some tests to see if it will point us in the right direction:
After each, I will ask you to 'test', which means that I want you to see if the issue remains
Run the following before anything:
http://sd.stardock.com/Support/supportToolTest/SDSupportTool.exe
Do not post the zips here, its just a baseline to be paired with a ticket should it come to that. Set the zip aside for a reply after the tests.
Version Test
-Install this version:
http://sd.stardock.com/Support/Software/Fences/Fences_3.05_beta_sd.exe
-Reboot
-Test
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Icon QTY Test
-Try to count how many icons you have on your desktop
-Create a folder off the Desktop and place all of your desktop icons in it
-Test
-If the lag is gone, add icons back to the desktop in groups of 10
-Test noting when, and at what number of icons, the lag returns.
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Icon Type Test
-If possible, is the icon type at all relevant to the problem? For example, 'If I remove all the network shortcuts, to no local drives, it runs fine.' We had one report from a guy that said if he removed all of his PDF, everything was fine. What we did not gleen (he stopped responding) was if removing all the PDFs just drastically reduced his icon count (and perhaps that was the real problem).
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3rd party app test:
Create a new Windows Administrator (<--important that its an Administrator) account:
Winodws 7:
http://windows.microsoft.com/en-us/windows/create-user-account#create-user-account=windows-7
Windows 10:
http://windows.microsoft.com/en-us/windows-10/create-a-local-user-account-in-windows-10
Windows 8:
http://windows.microsoft.com/en-us/windows/create-user-account#create-user-account=windows-8
Log in under that account and try. If it fails, and while still under that account, please click the link below for performing a 'clean boot' under it:
https://support.microsoft.com/en-us/kb/929135
Keep the Fences entry enabled:
http://sd.stardock.com/sean/JingImages/2016-07-28_1539.png
After you've loaded Windows in a clean state, please try once again. If it loads fine (no lag), we need to know what app or service, when re-enabled, is causing a conflict (not an easy chore, we know). Our gut tells its an AV or monitor manipulation app (DisplayFusion for example).
Any results you can share with us would be immensely helpful.