Hello, Sorry to hear about your laptop breaking down. In order for me to assist you with your laptop, I will need to know a couple of things
1. Suspected virus/trojan/malware - Have you done any virusscan, malware scan and adware scan?
2. Applications can still open and run?
If applications are still fine, it eliminates the possibility of ransomware but executable files are still prone to virus infection which is why you mentioned that applications are damaged / corrupted.
3. Please do not enter any personal details as keyloggers might be installed into your laptop ESPECIALLY banking sites and credit card details.
4. If the infection is severe, i would recommend a reformat of your PC but this will be a last option as i can see you requesting for assistance here to try to salvage the situation.
5. What software is pirated/counterfeit/unregistered? Is it WIndows or?