Avast Antivirus Causing Issues, Account Errors and Performance Problems

I recently purchased Avast Antivirus, trusting the brand for protection, but unfortunately, the software is not working as expected. It’s constantly slowing down my system, and I keep getting account error messages like “wrong account” notifications. I chose Avast because I believed in its reliability, otherwise I could have gone with HP’s antivirus. I’m now reaching out to Avast customer service for urgent help in resolving these issues. I trusted Avast, but this experience has been disappointing. Please assist in fixing these problems as soon as possible so I can use the software properly.