Hi there, @RockSolid2022. 

Thanks for taking the time to follow along with the thread. I hope you're enjoying the day so far. 

Since you've not made any changes to the alignment or printer, but you have started using another computer, let's go through some basic troubleshooting steps for printing. 

First, let's use the PDF print repair tool in the QuickBooks Tool Hub. Here's how: 

1. Close QuickBooks.
2. Download the most recent version (1.5.0.0) of the QuickBooks Tool Hub. Save the file somewhere you can easily find it (like your Downloads folder or your Windows desktop). 
3. Open the file you downloaded (QuickBooksToolHub.exe).
4. Follow the on-screen steps to install and agree to the terms and conditions.
5. When the install finishes, double-click the icon on your Windows desktop to open the tool hub.
6. In the QuickBooks Tool Hub, select Program Problems.
7. Select QuickBooks PDF & Print Repair Tool. It will take about a minute to run.
8. Attempt to print, email, or save as a PDF from QuickBooks Desktop again.

Once you've ran the repair tool, let's try printing a check again. 

If you're continuing to have issues, let's use the Alignment Grid to adjust the horizontal/vertical settings and make fine adjustments to the position of printed text on your checks. Please note that you'll have to select Voucher (8 1/2" x 11") as the check style to ensure that the check will align with the envelope. Here's how you can do it:
 

1. Select File from the top menu bar, then choose Printer Setup.
2. From the Form Name drop-down menu, select Check/Paycheck.
3. For the check style, choose Voucher.
4. Click the Align button.
5. Hit Print Sample, then compare it to your pre-printed checks.
6. Using the grid on the sample, adjust the horizontal and vertical settings, then click OK.
7. Click Align again and print another sample.
8. Compare the sample to your paycheck stock and adjust the alignment again as necessary.
9. Repeat steps 4 through 8 until you have the alignment perfect.

Please let me know if you have any questions or concerns. I'm always here to lend a helping hand. Take care!