help please , I have been getting a box come up when I start up its IDM the days have been counting down to register it but I don't want it you have to pay anyway for it ,im not sure how to get rid as it is not in control panel any help appreciated .how has the bloody thing got on my pc 

My Computer
At a glance
win 7 x64 bit4 gb
- Computer type
- Laptop
- Computer Manufacturer/Model Number
- acer aspire model number 5532
- OS
- win 7 x64 bit
- Memory
- 4 gb
- Other Info
- windows 8 laptop +
samsung tablet