Hi there, @mmad10. 

Thank you for reaching to the Community. 

There are some possible reasons why your QuickBooks is performing slow. There could be a Large file amount, we can cut down the size of your company file. 

Though, we need to make sure we meet the system requirements:  

• Windows 10, all editions including 64-bit
• Windows 8.1 (Update 1)
• Windows 7 SP1, (only supported until January 2020)
• Windows Server 2016
• Windows Server 2012 R2
• Windows Server 2011, Standard and Essentials
• Windows Server 2008 R2 SP1 (only supported until January 2020) 

Please come back to the Community if you have other questions in QuickBooks. I'm here to lend a hand. Have a great day!