So one of my laptops had a virus recently. I managed to remove it by running my computer in safe mode and then running my Antivirus software (norton). My laptop appears on be running fine now. 

Should I feel ok checking my bank account and doing personal business items on it now? Or should I still be worried that a virus is there?

Computer is less than 2 years old. Barely used. Computer was acting funny and slower than usually so I brought it into safe mode and my Antivirus discovered the virus and removed it. 

No, you cannot determine how close you guessed looking at the hash. A hash function is designed with this in mind: one single changed bit on the input must change a lot of bits on the output. Its called Avalanche Effect.

Bellow are SHA1 hashes for some of your example passwords:

cbfdac6008f9cab4083784cbd1874f76618d2a97 - password123

b2e98ad6f6eb8508dd6a14cfa704bad7f05f6fb1 - Password123

2b4bfcc447c3c8726d26c22927a68f511d5e01cc - password124

115b55dcc1cd9a0dfdd60c120e83eaf658c45fc6 - right horse battery staple

abf7aad6438836dbe526aa231abde2d0eef74d42 - correct horse battery staple


A single bit change will completely change the hashing result. In fact, in an ideal case for every bit of input change every bit of output will be changed with a 50% probability.
