My issue with this is in order for me to access my software wallet, I need to enter my seed on that computer. I have my seed on paper but also in my password manager. Thus me entering my seed into the laptop could compromise it if if already wasn't compromised.
Forget about the password manager if you have that same seed on your computer. You have a Ledger Nano S. Why are your coins not on the Ledger?
Someone recommended me to download kapersky total and scan for virus/malware. But would that work? Such that if it finds any malware/trojan or browser hijacking, then it could remove all of it? And thus I could continue to use my possible compromised laptop as is?
You ask for advice. People give you advice. Then you ask if the given advice is good or if you should do it in a different way. Ultimately, you are probably not going to listen to what people tell you anyway. An anti-virus or anti-malware software is not some magical eraser that undoes your mistakes. It could find and neutralize a malware on your computer, but it is also possible that it doesn't detect it at all. In case of new malware, the software might not have the definitions to classify it as malicious. We don't know what you clicked on and if the site was configured to automatically download and execute some type of malware.
Advice on this?
You have played with fire and now you got burned. You have been told multiple times not to store your seed digitally and you keep finding excuses why that's OK for you.
Your computer might be compromised. If you are lucky, it wasn't. Buying a new computer won't solve the problem that the files you have on your old one are potentially infected. If your coins are your priority, reformat your computer, and start from scratch.
If your coins are gone, they are gone. There is very little you can do about it. Buying a new computer just to restore your wallet will only tell you if they are there or not. What are you going to do with the old one and the data you keep on it?