Like other programs, PowerShell can be uninstalled easily. Type PowerShell in the Start Menu search box. It will reveal all the versions of PowerShell i.e., PowerShell (x86), PowerShell, PowerShell 7, ...
You can run a PowerShell cmdlet to download and install the MSI package from GitHub. Alternatively, you can visit the GitHub PowerShell release page and scroll down ...
You can give your system a "mini-reset" with Task Scheduler every time you log in. This can help you clear temporary files, ...