all the video editing softwares are not showing previews even when i updated all the nvidia drivers

We're aware of a similar issue. Sorry for the inconvenience.

As a workaround, you can change the driver of the integrated GPU to Basic. Here are the steps:

1. Close After Effects
2. Go to the Device Manager (Run >> devmgmt.msc)
3. Select Display Adapter, Right click on the "Intel UHD graphic card".
4. Select "Update Driver"
5. Select "Browse my Computer"
6. Select "Let me Pick from a list of available drivers on my Computer".
7. Select "Microsoft Display Adapter".
8.  Launch After Effects.

Let us know if it helps.

Thanks,

Nishu