After using for the 1st time, cannot reboot my Laptop, has blank screen or locked

After using for the 1st time, cannot reboot my Laptop, has blank screen or locked

I installed the latest free verision of PocketCloud remote on a HP Pavilion g4 laptop. Also followed all directions to install the app on my RAZR MAXX. Works fine first time through, I primarily used my phone to present a powerpoint presentation on my laptop. However,
once I disonnect from my phone and try to restart or re-boot my laptop, I have all types of problems and the laptop either has a blank screen or makes it to the desktop but is locked up. What is this issue? Do I have to re-build my desktop to restore my laptops functionality now to a date prior to the install? My laptop is useless at this point, help, I need it back!!! Is this a compatability issue with HP laptops?