Popping and crackling sounds during playback

Hi everyone,

I need help with my Audition CS6. I use a Focusrite Scarlett 2i2 interface with my HP Pavilion 15 (Core i7) PC which I'm sure is more than capable for adequate processing. I usually record with one mic which is the RODE NT1-A Condenser. Every time I record let's say at least a 1-minute piece of audio, I hear at least one crackle or pop. And it cannot be erased. Even after exporting the file, I still hear it. I have tried EVERYTHING to get this fixed. Before anyone offers any solutions, please note what experiments I conducted to try and find out the root of the issue:

1. I plugged the mic into a different input;

2. I used a different mic;

3; I used a different audio interface;

4; I used a different XLR cable;

5. I used a different PC with Adobe Audition CC 2015 installed;

6. I even changed the buffer size to the highest setting (500ms).

Still nothing. I have officially run out of ideas. I completely have no clue how to fix this issue. If anyone can help me with this, I would really appreciate it.

Thanks in advance.

Khaleeq