GTA 4 dando lag nas teclas W S A D

Question

Tenho GTA 4 original e meu PC ta dentro das recomendações de hardware do jogo, só que quando aperto as teclas w s a d e um lag pra cada aperto se eu aperta sem parar qualquer uma dessas e ele praticamente para, queria saber se alguém conhece alguma configuração pra acabar com isso.
Rodo ele com um AMD Phenom II X4 3.4 Black, ATI HD5670 1 GB, 4GB memória Dual Chanel, Fonte 680W e Win7.
Não tenho problema com qualquer jogo instalado no meu PC só com o GTA4.
 
Olha só ai os requerimentos dele, o meu PC era pra rodar sem problemas:
1) SYSTEM REQUIREMENTS
Supported Operating Systems are:
    Windows Vista (plus Service Pack 1)   
    Windows XP (plus Service Pack 3)
        plus DirectX 9
        plus Microsoft .NET Framework 3.5
Minimum Hardware Requirements:
    Processor: Intel Core 2 Duo 1.8Ghz, AMD Athlon X2 64 2.4Ghz
    Memory: 1.5GB
    Free Hard Drive Space: 16GB
    Video Card: 256MB NVidia 7900 / 256MB ATI X1900
    DirectX 9 compatible Stereo Sound Card
    Keyboard
    Mouse
Recommended Hardware Requirements:
    Processor: Intel Core 2 Quad 2.4Ghz, AMD Phenom X3 2.1Ghz
    Memory: 2GB (Windows XP) 2.5GB (Windows Vista)
    Free Hard Drive Space: 18GB
    Video Card: 512MB NVIDIA 8600 / 512MB ATI 3870
    DirectX 9 compatible Surround Sound Card
    Keyboard
    Mouse

Answer 1

Online medicine home delivery <a href=https://indianpharm1st.com/#>Online medicine home delivery</a> india pharmacy mail order

Answer 2

https://indianpharm1st.com/# top 10 online pharmacy in india

Answer 3

mexican mail order pharmacies: <a href=" https://mexicanpharm1st.com/# ">purple pharmacy mexico price list</a> - buying prescription drugs in mexico online

Answer 4

mexican rx online: <a href=" http://mexicanpharm1st.com/# ">medication from mexico pharmacy</a> - pharmacies in mexico that ship to usa

Answer 5

buying from online mexican pharmacy: <a href=" http://mexicanpharm1st.com/# ">mexican online pharmacies prescription drugs</a> - buying prescription drugs in mexico

Answer 6

http://drugs1st.store/# buy online pharmacy

Answer 7

mexican online pharmacies prescription drugs: <a href=" http://mexicanpharm1st.com/# ">п»їbest mexican online pharmacies</a> - medication from mexico pharmacy
http://drugs1st.store/# sexual dysfunction in men

Answer 8

ed in young men: <a href=" http://drugs1st.store/# ">buy canadian drugs</a> - ed help

Answer 9

pet antibiotics without vet prescription <a href=http://drugs1st.store/#>amoxicillin without a doctor's prescription</a> online drugs

Answer 10

indian pharmacy paypal <a href=" https://forum.beloader.com/home.php?mod=space&uid=801714 ">indianpharmacy com</a> or <a href=" https://www.google.com.ar/url?sa=i&url=https://indianpharm1st.com ">mail order pharmacy india</a>
https://huongnghiepviet.com/support-form?action=1&cckid=4776&typeaction=dkhocts&url=https://indianpharm1st.com pharmacy website india
<a href=https://cse.google.co.vi/url?q=https://indianpharm1st.com>best india pharmacy</a> pharmacy website india and <a href=https://www.xiaoditech.com/bbs/home.php?mod=space&uid=1929552>cheapest online pharmacy india</a> india pharmacy