I am currently running Windows Movie Maker 2011. I'm having problems opening a saved project.

For example: I load in 8 video clips file type AVCHD (.m2ts) at a about 4 minutes long for all the clips added together. I do not have a problem loading the clips into Movie Maker the problem is when I save the project and reopen the project one clip will have the dreaded exclamation mark "!" on one of the files.

Now get this, if I than close the project and reopen the same project that  exclamation mark "!" is now on a different clip and the clip that had the exclamation mark "!" is now working fine. I could do this all day and that exclamation mark "!" will move from clip to clip.

After the problem started I did load and use Windows Movie Maker 2012 and that was worse so I'm back to Windows Movie Maker 2011.

As for Windows Movie Maker 2011 I have had it on this computer for approximately 2 years and I have not had a problem until recent. Just a year ago I loaded 30 minutes of  AVCHD (.m2ts) video and saved the project numerous times editing over a few weeks time and made a 10 minute long HD video without any problems.

I have researched this on Google, and various forums and I can't find a fix,

PLEASE HELP.

Below is the computer in question:

Window 7 Home Premium 64 bit (6.1, Build 7601)

Service Pack 1

Dell  XPS 8300

Processor:                               Intel Core i5-2310CPU @ 2.90GHz

Installed Memory (RAM):     6.00 GB

System Type:                          64-bit Operating System

BIOS:                                      Ver: 04.06.04  06/20/11

Page file:                                2571 MB used, 9679 available

DirectX Version:                    DirectX 11

Display:          AMD Radeon HD 6670 

                        Driver Version:    13.152.1.8000   10/8/2013

                        Driver Model:  WDDM 1.1

                        Chip Type: AMD Radeon Graphics Processor (0x6758)

                        DAC Type:  Internal DAC (400MHz)

                        Approx Total Memory: 3829 MB

                        Current Display Mode: 1280 x 1024 (31 bit) (60 Hz)