Hey There,
Every Time I get On a horse to Ride it. The Game Lags Every 4 Seconds (Approximately) I Don't Know if Its My PC or if its A Bug. But Other Than That My Game Runs Fine when I'm On a Horse Riding it.

Here's My System Information (If Needed):

Processor: AMD Athlon(tm) II X2 270 Processor 3.40 GHz

Memory (RAM) 4.00 GB

System Type 32-bit Operating System

Graphics Card: ATI Radeon HD 5450